moveconfig: Drop check for old Python

Python 2 is not supported anymore and Python 3 has had subprocess.DEVNULL
since version 3.3 which was released in 2012. Drop the unnecessary check.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
1 file changed